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credentials

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I was working with a customer who had Exchange 2010 & were in the process of migrating to Exchange 2013. As part of their migration process they pointed their Exchange 2010 Outlook Anywhere namespace (let’s call it mail.contoso.com) to Exchange 2013 in DNS. At this point all of their Outlook Anywhere clients should have been connecting to Exchange 2013 & then been proxied to Exchange 2010. While this was somewhat working, they also immediately noticed users were randomly being prompted for credentials, resulting in a negative user experience.

Sometimes the prompts would be when connecting to Public Folders while other times mail or directory connections from Outlook to Exchange.

Resolution

When I was approached with this issue/symptom it sounded familiar. After a search through my OneNote I realized I previously had a discussion with some people I know from Microsoft Support regarding this issue. Turns out this issue was recently addressed via http://support2.microsoft.com/kb/2990117 “Outlook Anywhere users prompted for credentials when they try to connect to Exchange Server 2013”.

This is actually an IIS issue with Server 2008 R2 (the operating system Exchange 2010 was installed on) that’s resolved by a hotfix. After installing the hotfix & rebooting the issue was resolved & their users no longer received the prompts.

Tools

I’m happy to announce a significant update to our scalability guidance for Exchange 2016. Effective immediately, we are increasing our maximum recommended memory for deployments of Exchange 2016 from 96 GB to 192 GB. This change is now reflected within our Exchange 2016 Sizing Guidance, as well as the latest release of the Exchange Server...

Over the last few months, we ran a TAP Program where our customers tested the batch migration process to move their public folders (both online and on-premises) to Office 365 Groups. We want to thank all of the customers who helped us out with the testing by sharing their experiences with us. The TAP program...